Mechanical mounting for lamp bulbs



June 29, 1937. I ABRAM'SQN I 2,085,207

MECHANICAL MOUNTING FOR LAMP BULBS Filed May 9, 1935 INVENTOR flbrah amibrams 0/7 ATTORN EYS Patented June 29, 193? UNHTEE fi'lATES image?FATENE @FFiCi-Z MECHANICAL BIQUNTING FOR LAMP BULBS Application May 9,1935, Serial No. 20,562

6 Claims.

This invention relates to lamp mountings and more particularly tomountings for incandescent lamp bulbs.

In certain types of Christmas tree ornaments an incandescent lamp ismounted in the body of the ornament with the threaded stem of the lampprojecting therefrom for reception in a lamp socket. If the body of theornament is made of metal, or other conducting material, it is necessaryto provide a mounting whereby the stem is insulated from the body. Thepresent invention is directed to a lamp mounting particularly adaptedfor this purpose although it is capable of use in many otherconstructions.

In carrying out my invention I provide the body of the lamp or otherdevice with an opening to receive an insulating washer or lamp support.The stem of the lamp passes through an opening in the lamp support. Theopening in the body of the ornament and the lamp support are shaped toprevent relative rotation of these members when the lamp support is inposition and the stem of the lamp bulb is locked to the lamp support toprevent rotation of the lamp in the support.

In the accompanying drawing I have shown several embodiments of theinvention. In the drawing:

Fig. l is a vertical sectional view of a Christmas tree ornament showingone form of the invention;

Fig. 2 is a plan view of the lamp support;

Fig. 3 is a similar view of an insulating washer used in conjunctiontherewith;

Fig. 4 is a plan View of a washer or plate car- 5 rie-d by the lampbulb;

Fig. 5 is a vertical, sectional view of another 1 form of the invention;

Fig. 6 is a plan View of the lamp support;

Fig. '7 is a side elevation thereof;

Fig. 8 is a plan view of a metal plate or Washer carried by the lampbulb; and

Fig. 9 is a side elevation of a lamp bulb showing the plate or washer ofFig. 8 in position thereon.

Referring to Figs. 1 to 4 of the drawing I have there illustrated aChristmas tree ornament consisting of a bell shaped member I havingsuitable ornamental openings 2 through which light may pass. The lampbulb mounting forming the subject matter of the present inventionconsists of a recess or depression 3 in the end of the body of theornament which recess or depression is circular to receive the circularbody portion G of the lamp bulb support shown in Fig. 2 of the drawing.The bottom of the depression is provided with a square opening adaptedto receive a projecting portion 5 formed on the face of the lamp bulbsupport and adapted to pass through this opening. It will be apparentthat when the body 5 of the lamp bulb support is arranged in the recessor depression 3 with the square projecting portion 4 extending throughthe square opening in the bottom of the recess that the lamp bulbsupport is incapable of rotational movement with respect to the body ofthe ornament. A washer 6 (see Fig. 3) having asquare opening l isinsorted in the body of the ornament from the opposite end and arrangedover the projecting portion l of the lamp bulb support as shown in Fig.l of the drawing. The end of the ornament is closed by a plate 8 whichis held in position by lugs 9 projecting from the body and this platemay be inserted after the lamp bulb has been assembled. A lampconsisting of a bulb l3 and a specially long threaded stem H which isnecessary to be used with the construction herein disclosed, is insertedin the ornament from the open end. This bulb carries a plate i2 having aplurality of upwardly extending flanges l3.

In assembling the device with the plate 8 removed the lamp bulb supportis first placed in the recess 3. The lamp bulb support is provided witha circular threaded opening i l adapted to receive the threads on thestem ll of the lamp bulb. .The washer 6 is inserted from the oppositeend and the opening therein receives the projection 5 of the lamp bulbsupport which extends through the opening in the bottom of the recess.The bulb is then inserted and threaded through the opening i i of thelamp bulb support. The flanges 53 bear on the washer 6 causing thewasher G and the lamp bulb support 4 to be drawn against the bottom ofthe recess 3 when the bulb is tightened in the socket. To prevent thebulb from rotating in the socket a metal ring l5 may be screwed on tothe projecting portion of the threaded stem, after the parts have beenassembled and secured in position by solder it. With the parts soassembled, the plate d is arranged on the open end of the body of theornament and the lugs 9 secured over it.

In the form of the invention shown in Fig. 5 of the drawing I provide anornament consisting of a body portion ll. In this form of the inventionthe lamp bulb is adapted to be assembled in its support and theninserted in position. As shown, the body of the ornament is providedwith a recess I8, which is circular in shape and which is provided witha square opening large enough in diameter to permit the lamp bulb H] topass through it. The lamp bulb support consists of a circular plate ordisc IQ of insulating material (see Figs. 6 and '7) having a projectingportion '20 on its inward surface which is square in cross section andis adapted to pass through the square opening in the bottom of therecess I 8 to secure the member l9 against rotation in the body of theornament. The outer surface of the projection 2t is formed into aplurality of faces 2! arranged in different planes forming ratchet teeth22 at the junction of these faces. A plate 23 is secured to the stem ofthe lamp bulb and this plate is provided with a plurality of radialslits forming teeth 24 which are adapted to engage the ratchet teeth 22to prevent rotation of the lamp bulb in a reverse direction. In thisform of the invention the lamp bulb is first arranged in the lamp bulbsupport i 9. As shown, the lamp bulb support is provided with a circularthreaded opening '25 adapted to receive the threaded stem of the bulb.The bulb is screwed into the support and reverse movement of the bulb isprevented by engagement of the teeth 22 and the teeth 2A. The device isthen inserted in the ornament and the projection of the portion 20 ofthe lamp bulb support through the square opening in the bottom of therecess l8 prevents rotation of the lamp bulb holder after it has beeninserted in the ornament. It is secured in position by means of aplurality of tabs or projections 28 formed on the body of the ornamentand adapted to be secured over the outer face of the lamp bulb holder.

Either form of the invention provides a relatively simple means forsecuring a lamp bulb in a Christmas tree ornament or other device fromwhich it must be insulated with the bulb arranged inside the body of theornament and the stem projecting therefrom to be secured in a suitablelamp socket. In each form of the device the lamp bulb holder is lockedagainst rotation by the arrangement of the projecting portion in thesquare opening at the bottom of the recess in the body of the ornament.The bulb is likewise locked against rotation in the holder by the meansshown in each form of the invention. While the openings in the ornamentthrough which portions of the lamp bulb holders project have beendescribed as being square in cross section it will be apparent that theymay be of any shape other than circular and may be received in openingsof the same shape whereby rotation of the lamp bulb holder in theornament is prevented. It will also be apparent that variousmodifications may be made in the details of construction hereindisclosed without departing from the spirit of the invention.

I claim:

1. A lamp bulb mounting unit including a casing member having a recessand an opening covering 360 in said recess, a bulb holder of insulatingmaterial wholly mounted within said recess, and having a portionprojecting through said opening Within the casing member, means forretaining said holder in said recess, said holder having an openingtherein smaller than the bulb and a lamp bulb having an extra long stemmounted in said holder so a part of the stem is within the holder andthe remainder projecting therefrom to the approximate length of astandard bulb of the type herein described, the projecting end of thestem serving to mount the unit into a current supply socket.

2. A lamp bulb mounting unit comprising a casing member having aninturned recess and having a non-circular opening covering 360 in saidrecess, a bulb holder mounted in said recess having a portion shaped tofit said opening and projecting into said opening to secure said bulbholder against rotation, means for retaining said bulb holder in saidrecess, said bulb holder hav ing an opening therein and a lamp bulbmounted by its stem in said holder, the stem of the bulb being of extralength with a part located within the holder, and the remainderprojecting from said member so the unit may be screwed into a currentsupply unit.

3. A lamp bulb mounting unit comprising a member having a recess andhaving an opening in said recess, a bulb holder mounted in said recessand having a portion projecting through said opening, a Washer arrangedon the opposite side of said member having an opening to receive saidprojecting portion, said bulb holder having an opening, a bulb mountedin said opening, and means carried by said bul and engaging said washerto retain said washer and said holder in engagement with opposite sidesof said member.

4. A lamp bulb mounting unit comprising a member having a recess andhaving a non-circular opening in said recess, a bulb holder mounted insaid recess and having a portion shaped to fit said opening andprojecting into said opening to secure said bulb holder againstrotation, the faces of said projection being provided with a pinralityof teeth, said bulb holder being provided with an opening, a bulbmounted therein, and a plate carried by the bulb having teeth adapted toengage the teeth on the face of said projection to prevent removal ofsaid bulb from said bulb holder, and means for retaining said bulbholder in said recess.

5. A lamp bulb mounting unit comprising a member having a recess andhaving a non-circular opening in said recess, a bulb holder mounted insaid recess and having a portion shaped to fit said opening andprojecting into said opening to secure said bulb holder againstrotation, said bulb holder being provided with an opening, a lamp bulbmounted in said opening, cooperating means on said bulb and the face ofsaid projecting portion of said holder to prevent rotation of said bulbin said holder, and means for retaining said holder in said recess.

6. A Christmas tree ornamental unit comprising a body of opaque materialhaving openings therein arranged over the surface of the body throughwhich light may pass, a lamp bulb mounted in said body and having anextra long threaded stem of uniform diameter with a part located withinthe body and a part projecting therefrom, and means for mounting saidbulb in said body, said means comprising an inwardly extending recessformed in said body and having an opening covering 360 therein, a bulbholder lying wholly within the recess and having an opening for thereception of the threaded stem of said bulb arranged in said recess andhaving said projecting part of the stem extending through said openingtothe length of a bulb standard for the purpose described, and means forretaining said bulb holder in said recess thereby completing a unitwhich can be screwed into a current supply socket.

ABRAHAM ABRAMSON.

